IE42456L - Synthesis of ureas - Google Patents

Synthesis of ureas

Info

Publication number
IE42456L
IE42456L IE752693A IE269375A IE42456L IE 42456 L IE42456 L IE 42456L IE 752693 A IE752693 A IE 752693A IE 269375 A IE269375 A IE 269375A IE 42456 L IE42456 L IE 42456L
Authority
IE
Ireland
Prior art keywords
ureas
under
pressures
expected
synthesis
Prior art date
Application number
IE752693A
Other versions
IE42456B1 (en
Original Assignee
Anic Spa
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Anic Spa filed Critical Anic Spa
Publication of IE42456L publication Critical patent/IE42456L/en
Publication of IE42456B1 publication Critical patent/IE42456B1/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D239/00—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings
    • C07D239/02—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings
    • C07D239/06—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member
    • C07D239/08—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member with hetero atoms directly attached in position 2
    • C07D239/10—Oxygen or sulfur atoms
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D233/00—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings
    • C07D233/04—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member
    • C07D233/28—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
    • C07D233/30—Oxygen or sulfur atoms
    • C07D233/32—One oxygen atom
    • C07D233/34—Ethylene-urea
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C273/00—Preparation of urea or its derivatives, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups
    • C07C273/18—Preparation of urea or its derivatives, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups of substituted ureas
    • C07C273/1809—Preparation of urea or its derivatives, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups of substituted ureas with formation of the N-C(O)-N moiety
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D233/00—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings
    • C07D233/04—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member
    • C07D233/28—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
    • C07D233/30—Oxygen or sulfur atoms
    • C07D233/32—One oxygen atom

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

A method for the preparation of a group of variously substituted ureas is disclosed, these compounds being obtained by the pyrolytic decomposition of the alkali metal or alkaline earth metal carbamates corresponding to the expected ureas, the reaction taking place at a temperature of between 150 DEG and 400 DEG C under atmospherical pressures, and preferably under subatmospherical pressures, under which conditions the expected urea either sublimes or is distilled. [US4063021A]
IE2693/75A 1974-12-10 1975-12-10 Method for the synthesis of ureas IE42456B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT30341/74A IT1026907B (en) 1974-12-10 1974-12-10 PROCEDURE FOR THE SYNTHESIS OF UREE

Publications (2)

Publication Number Publication Date
IE42456L true IE42456L (en) 1976-06-10
IE42456B1 IE42456B1 (en) 1980-08-13

Family

ID=11229569

Family Applications (1)

Application Number Title Priority Date Filing Date
IE2693/75A IE42456B1 (en) 1974-12-10 1975-12-10 Method for the synthesis of ureas

Country Status (19)

Country Link
US (1) US4063021A (en)
JP (1) JPS594423B2 (en)
AT (1) AT349487B (en)
BE (1) BE836387A (en)
CA (1) CA1058174A (en)
CH (1) CH624097A5 (en)
DE (1) DE2555582A1 (en)
DK (1) DK557075A (en)
ES (1) ES443591A1 (en)
FR (1) FR2294169A1 (en)
GB (1) GB1499180A (en)
IE (1) IE42456B1 (en)
IT (1) IT1026907B (en)
LU (1) LU73953A1 (en)
NL (1) NL172951C (en)
NO (1) NO754162L (en)
SE (1) SE431203B (en)
SU (1) SU900804A3 (en)
ZA (1) ZA757617B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57139069A (en) * 1981-02-20 1982-08-27 Nippon Tokushu Noyaku Seizo Kk Substituted tetrahydropyrimidinone derivative, its preparation and herbicide
US4405794A (en) * 1981-12-18 1983-09-20 The Dow Chemical Company Preparation of 2-oxazolidinone and ethyleneurea
JPS58140078A (en) * 1982-02-16 1983-08-19 Nippon Tokushu Noyaku Seizo Kk Methyl-substituted tetrahydro-2-pyrimidinone derivative, its preparation, its intermediate, preparation of said intermediate, and herbicide
JPH0333420U (en) * 1989-08-10 1991-04-02
DE19743760A1 (en) * 1997-10-02 1999-04-08 Basf Ag Process for the preparation of cyclic urea derivatives
DE29820895U1 (en) 1998-11-23 1999-02-18 ECS Eich Maschinenbau GmbH, 35745 Herborn Mobile water purification device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2276696A (en) * 1939-10-06 1942-03-17 Sharples Chemicals Inc Manufacture of homologues of urea
US3053891A (en) * 1959-05-05 1962-09-11 Chemical Construction Corp Process for production of urea
US3923833A (en) * 1968-05-01 1975-12-02 Hoffmann La Roche N-{8 (1-cyano-2-phenyl)ethyl{9 carbamates

Also Published As

Publication number Publication date
SU900804A3 (en) 1982-01-23
DE2555582A1 (en) 1976-06-16
LU73953A1 (en) 1976-07-01
GB1499180A (en) 1978-01-25
SE431203B (en) 1984-01-23
CA1058174A (en) 1979-07-10
DK557075A (en) 1976-06-11
CH624097A5 (en) 1981-07-15
FR2294169B1 (en) 1982-05-28
NL7514362A (en) 1976-06-14
US4063021A (en) 1977-12-13
NL172951B (en) 1983-06-16
AT349487B (en) 1979-04-10
ATA933175A (en) 1978-09-15
ZA757617B (en) 1976-11-24
JPS594423B2 (en) 1984-01-30
JPS5182225A (en) 1976-07-19
ES443591A1 (en) 1977-05-01
FR2294169A1 (en) 1976-07-09
NO754162L (en) 1976-06-11
BE836387A (en) 1976-06-08
IT1026907B (en) 1978-10-20
SE7513879L (en) 1976-06-11
IE42456B1 (en) 1980-08-13
NL172951C (en) 1983-11-16

Similar Documents

Publication Publication Date Title
RO83836B (en) Process for preparing compounds with isocyanidic groups
ES467840A1 (en) PROCEDURE FOR THE DEGRADATION OF POLYURETHANE SYNTHETIC MATERIALS.
GB1213779A (en) Production of organo-silicon compounds
ES443591A1 (en) Method for the synthesis of ureas
Larock et al. Synthesis of allylic alcohols via organopalladium additions to unsaturated epoxides
SE7409562L (en)
GB1531706A (en) Process for producing carbohydrate-phenol condensation resins
GB1367819A (en) Tetrahydrodibenzopyrans
GB1491973A (en) Manufacture of aliphatic isocyanates
DE3567846D1 (en) Process for preparing cyanamide
IE42388L (en) Preparing pinacolone
GB1491974A (en) Manufacture of aliphatic isocyanates
IE45604L (en) Prostacyclin derivatives
GB1517599A (en) Recovery of palladium from spent catalyst material
ES441421A1 (en) Crude cyanuric acid purification
ES8401439A1 (en) Process for producing aromatic hydroxycarboxylic acids.
GB1499128A (en) Manufacture of aliphatic isocyanates
GB1249613A (en) PROCESS OF PREPARING gamma-CYANOBUTYRALDIMINES
CA2092407A1 (en) Process for the preparation of 2,3-difluoro-6-nitrophenol
IE41921L (en) Preparation of 3, 7-dimethyl-3-hydroxy-6-octenenitrile
IE41081L (en) Production of aromatic urethanes
GB1591444A (en) Process for the production of 2-alkyl or 2-cycloalkyl-4-methyl-6-hydroxypyrimidines
GB1446537A (en) Process for the manufacture of oxo compounds
GB1516900A (en) Process for the manufacture of hexamethyldisilazane
GB1470985A (en) Urea derivative containing isocyanate groups